Tractor mounted blasting punch



Jan. 17, 1956 o. HAMRAN 2,730,972

TRACTOR MOUNTED BLASTING PUNCH Filed Aug. 14, 1953 INVENTOR. 044V HflMEA/K H7701? IVE KS United States Patent p 2,730,972 TRACTOR MouN rnn BLASTING PUNCH QOlav Hainran, Isarchwood, Iowa Application August 14, 1953, Serial No. 374,282

2 Claims. tel. 11149) This invention relates to a device attachable to a tractor, earth working machine, or like vehicle, whichdevice will be specifically designed toform a hole in the earth in which an explosive charge canbe subsequently inserted.

Various means have previously been devised for forming a hole in the earth, in which a stick of dynamite or other explosive charge can be positioned, but to my knowledge, it has not heretofore been proposed that such means be mountable upon a tractor, with the means being adjustably positioned preliminary to forcing of the same into the earth, the tractor being adapted to supply the power whereby the hole forming assembly can be we tended into the earth a selected distance.

The broad object of the present invention is to provide a tractor mounted means that will function in the manner described above. More particularly, it is an object of the present invention to provide a blasting punch that, summarized briefly, includes an elongated, pointed rod removably anchored in a vertically swinging body, said body being pivotally connected to a horizontally swingable clevis that is attachable to a conventional tractor, earth working machine, or like vehicle. It is proposed, by forming a blasting punch in the manner stated, to allow forward or backward movement of the vehicle to provide the power necessary to form a dee small diameter hole in the earth, which hole will be specifically designed to allow an explosive charge to be located at a selected depth, and at a selected angle, relative to an object to be dislodged.

Another object is to provide a blasting punch of the type stated which, when not in use, can be readily positioned inoperatively,,in an out-of-the-way location, where it will not interfere with regular use of the tractor or similar vehicle.

Yet another object is to provide, in a blasting punch as stated, means whereby a tractor mounted winch can be readily used for shifting the blasting punch to a selected angle relative to the earth surface.

A further object of importance is to provide a blasting punch as described wherein the hole-forming rod can be removed from the structure supporting the same, for sub stitution of another rod of dilferent length.

Other objects will appear from the following tion, the claims appended thereto, and from the annexed drawing, in which like reference characters designate like parts throughout the several views, and wherein:

Figure l is a side elevational view of a blasting punch formed in accordance with the present invention, mounted upon a conventional tractor, the dotted lines showing a second position of the punch and tractor after the hole has been formed;

Figure 2 is an enlarged perspective view of the blasting punch per se; and

Figure 3 is an enlarged, line 33 of Figure 2.

The reference numeral has been applied generally in the drawing to designate a conventional tractor or similar vehicle, such as a bulldozer. It will be underdescripdetail sectional view taken on 2,730,972 Patented Jan. 17, 1956 blasting punch can be the general nature illusto the connecting bolt 18. The opening or bore 24 is adapted to receive a second connecting bolt, whereby the clevis is attached to the drawbar of the tractor for horizontal swinging movement.

Formed in the smaller end of the body 14 is an axial recess 26, and welded or otherwise fixedly secured within said recess is a sleeve 28. The sleeve 23, at its inner end, has a transverse opening registering with a transverse bore formed in the mid-length part of the body 14, and extending through the aligned openings of the sleeve and body is a cross pin 30. Cross pin 30 is tightly fitted in its associated, registering openings of the sleeve and body, but it will be understood that the cross pin can be forced out of said openings whenever desired.

An elongated rod 34 is pointed at one end, as at 36. At its other end, the rod 34 has a transverse opening receiving the cross pin 30. In this Way, the rod 34 is removably but fixedly anchored within the socket of the body. The purpose of the removable connection is to allow a rod of different length to be substituted, as and when desired.

Rod 34, adjacent the inner end thereof, has an upstanding, apertured ear 38, and connected to said ear is one end of a winch cable 40, trained about an idler pulley 42 rotatably mounted at the outer end of an inclined arm 44 secured to the tractor and held in position by a brace 46. Cable 44 is wound about the drum of a winch 48 mounted on the tractor.

By reason of the arrangement illustrated and described, operation of the winch is effective to swing the rod 34 and the body 14 upwardly or downwardly, as the case may be, to selected angles relative to the ground surface G. Thus, the winch can be used to dispose the rod 34 at the angle at which the rod is shown in full lines in Figure 1, relative to a stump S to be blasted. Further, the clevis can be horizontally swung if necessary to shift the rod 34 horizontally, should it not be possible to dispose the vehicle in longitudinal alignment with the rod.

in any event, after the rod has been properly positioned as shown in full lines in Figure l, the tractor can be put in reverse, so as to move to the dotted line position in Figure 1. This will cause the rod 34 to be initially rocked upwardly on its pointed tip, after which the weight of the tractor and the tractor movement will combine to force the rod in the direction of its length into the earth, to the dotted line position shown in Figure 1. There is thus formed a hole specifically designed to receive a stick of dynamite or similar explosive charge, used for blasting the stump S.

When the device is not in use, it can of course be swung upwardly to an inoperative position in which it will not interfere with regular use of the tractor or similar vehicle.

It is believed apparent that the invention is not necessarily confined to the specific use or uses thereof described above, since it may be utilized for any purpose to which it may be suited. Noris the invention to be necessarily limited to the specific construction illustrated and described, since such construction is only intended to be illustrative of the principles of operation and the means presently devised to carry out said principles, it being considered that the invention comprehends any minor change in construction that may be permitted within the scope of the apended claims.

What is claimed is:

l. A blasting punch comprising: a 'clevis adapted for attachment to a tractor or like vehicle; a plate-like body having a socket, said body being 'pivotally connected to said clevis for vertical swinging movement; an elongated rod havingone end .removablyrengaged in said socket, said rod having its other end pointed for forcing of the pointedend ofihe rodzinto the earth, thereby to form a hole-for receiving an explosive charge; means extending through the body and the first named end of the rod for detachably anchoring the first named end of the ro in. said socket; and .meansextending betweenthe rod and tractor for'.swinging the 'rod and ,body'to selected posiin said socket; an elongatedrod having one .end removably fitted in said sleeve, said rod having its other end pointed for forcing of the pointed end of the rod into the earth, thereby to form a hole for receiving an explosive charge; means for detachably anchoring the first-named end of the rod in said sleeve, said means comprising. a

cross pin extending transversely through the body, sleeve, and rod; and means extending between the rod and said vehicle for swinging the 'rod' and body to selected positions of verticaladjustment, preliminary to torcing of the pointed end of the rod into the earth. i

References Cited the file of this inatent UNITED "STATES PATENTS 1,125,013 Gudmond-Hoyer Ian. 12, 1915 2,154,732 Dahl Apr. 13, 1939 2,618,871 Craver Nov..,2 5,, 1952 2,658,438 'Seng I V -V ov w, 1953 FOREIGN PATENTS 98,250 Switzerland Mar. 1, 1923 

